Straw incorporation influences soil organic carbon sequestration, greenhouse gas emission, and crop yields in a Chinese rice (Oryza sativa L.) –wheat (Triticum aestivum L.) cropping system

Wang, Haihou; Shen, Mingxing; Hui, Dafeng; Chen, Ji; Sun, Guoqing; Wang, Xin; Lu, Chang; Jiang, Sheng; LiuGen, Chen; Luo, Yiqi; Zheng, Jufeng; Zhang, Yuefang

doi:10.1016/j.still.2019.104377

Cited by 72 publications

(31 citation statements)

References 45 publications

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“…This is because topo‐edaphic gradients affect the spatial patterns of grassland plant productivity, soil nutrient availability, soil gravimetric moisture, and plant and microbial community composition (Dialynas et al, 2016; Jackson & Caldwell, 1993; Li et al, 2020; Sitzia, Semenzato, & Trentanovi, 2010). All these processes are expected to have major direct and indirect effects on SOC decomposition (Frank, Depzriest, McLauchlan, & Risch, 2011; Hook & Burke, 2000; Stark, Männistö, & Eskelinen, 2015; Wang et al, 2019). To more accurately predict soil C sequestration capacity in grazed grasslands, it is critical to gain a better understanding of how herbivory may interact with edaphic gradients to control rates of grassland SOC decomposition.…”

Section: Introductionmentioning

confidence: 99%

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Herbivores stimulate respiration from labile and recalcitrant soil carbon pools in grasslands of Yellowstone National Park

Chen

Frank

2020

Land Degrad Dev

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Quantifying the effects of grazing on soil organic carbon (SOC) decomposition is of crucial importance for understanding soil C dynamics. However, less attention has been paid to the pool-specific SOC decomposition and the underlying factors associated with each C pool, representing critical knowledge gaps on soil C dynamics. In this study, we applied a state-of-the-art Bayesian data assimilation technique to re-analyze previous soil incubation data to examine how herbivores influenced the fraction and cumulative respiration of labile and recalcitrant soil C pools from seven edaphically diverse sites in Yellowstone National Park, whereas those variables were not explored in the earlier study. Our results showed that grazing significantly increased cumulative respiration from both labile and recalcitrant C pools. Greater cumulative respiration from the labile C pool was related to grazers increasing labile C pool fractions, while higher cumulative respiration from the recalcitrant C pool was associated with grazers accelerating the decomposition rate of the recalcitrant C pool. Cumulative respiration from both labile and recalcitrant C pools was positively correlated with shoot biomass, soil gravimetric moisture, and soil C and nitrogen content. Our results underscore how knowledge of pool-specific SOC decomposition can provide a better mechanistic understanding of soil C dynamics along topo-edaphic gradients in grazed grassland.

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Section: Introductionmentioning

confidence: 99%

“…McLauchlan, & Risch, 2011;Hook & Burke, 2000;Stark, Männistö, & Eskelinen, 2015;Wang et al, 2019). To more accurately predict soil C sequestration capacity in grazed grasslands, it is critical to gain a better understanding of how herbivory may interact with edaphic gradients to control rates of grassland SOC decomposition.…”

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confidence: 99%

Herbivores stimulate respiration from labile and recalcitrant soil carbon pools in grasslands of Yellowstone National Park

Chen

Frank

2020

Land Degrad Dev

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“…In this study, no significant differences were found between straw returning and NS treatments (Table 1), which may be ascribed to the C/N ratio of the crop straws used (Bhattacharyya et al., 2012; Yao et al., 2013). Previous studies have demonstrated that if the C/N ratio of the returned crop residues is over 40, microorganisms can temporarily immobilize soil N, resulting in decreased N availability for nitrification and denitrification and thus the reduction in N 2 O production (Toma & Hatano, 2007; Wang et al., 2019). When the C/N ratio of the returned straws is below 24, mineral N will be released from the crop straws into the soil (Sakala et al., 2000), which will increase the substrates for nitrification and denitrification.…”

Section: Discussionmentioning

confidence: 99%

Inclusion of microbial inoculants with straw mulch enhances grain yields from rice fields in central China

Wang

Tao

Liu

et al. 2020

Food and Energy Security

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“…Wang et al. (2019) found that that the combination of reduced fertilizer rate coupled with straw retention produced comparable grain yields to broadcasting fertilizer in traditional rice production systems. Chen, Fan, Mo et al.…”

Section: Introductionmentioning

confidence: 99%

Effects of nitrogen deep placement coupled with straw incorporation on grain quality and root traits from paddy fields

Lin

et al. 2021

Crop Science

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The present study was conducted to investigate the effects of deep application of nitrogen (N) fertilizer and straw incorporation on grain yield and quality, nutrient accumulation, and root morphological and physiological traits in both rice (Oryza sativa L.) cultivars during 2019 and 2020. The experimental treatments were comprised of deep N fertilization with (DF+S) and without straw incorporation (DF) as well as broadcasting fertilization with (BF+S) and without straw return (BF). No fertilizer and no straw return treatment were taken as control. Results depicted that the DF+S and DF treatment significantly increased the grain yield by 46.4 and 42.2%, respectively, compared with BF. The DF+S also significantly increased total N accumulation by 37.9 and 44.0%, total phosphorus accumulation by 39.3 and 41.7%, total potassium accumulation by 63.6 and 73.3% for the cultivars Yuxiangyouzahn (YXYZ) and Wufengyou615 at maturity, respectively, compared with BF. Moreover, nutrient accumulation and grain yield of BF+S were slightly higher than BF. Straw incorporation resulted in better total root volume and total root length than no straw incorporation treatments in YXYZ, regardless of fertilizer application method. Root morphology traits are positively associated with other positive traits such as yield or nutrient uptake. The DF+S treatment also significantly increased the milled rice rate and remarkably reduced the chalkiness degree for both rice cultivars, compared to BF treatment. Overall, DF+S is recognized as the optimal method to improve rice productivity and quality with better nutrient acquisition.

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Straw incorporation influences soil organic carbon sequestration, greenhouse gas emission, and crop yields in a Chinese rice (Oryza sativa L.) –wheat (Triticum aestivum L.) cropping system

Cited by 72 publications

References 45 publications

Herbivores stimulate respiration from labile and recalcitrant soil carbon pools in grasslands of Yellowstone National Park

Herbivores stimulate respiration from labile and recalcitrant soil carbon pools in grasslands of Yellowstone National Park

Inclusion of microbial inoculants with straw mulch enhances grain yields from rice fields in central China

Effects of nitrogen deep placement coupled with straw incorporation on grain quality and root traits from paddy fields

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